Legal claims defining the scope of protection, as filed with the USPTO.
1. A data communication method in a wireless communication system including a radio link control (RLC) entity and a packet data convergence protocol (PDCP) entity, the method comprising: receiving a message associated with a handover; assembling at least one PDCP packet from at least one RLC packet; delivering the assembled at least one PDCP packet from the RLC entity to the PDCP entity; storing the delivered at least one PDCP packet in a PDCP buffer; generating PDCP status information and transmitting the PDCP status information; re-establishing the RLC entity; receiving, by the PDCP entity from the RLC entity, a new PDCP packet having a sequence number (SN); and delivering, by the PDCP entity to a higher layer, the at least one PDCP packet with an associated SN lower than the SN associated with the received new PDCP packet and the at least one PDCP packet with a consecutively associated SN starting from the SN associated with the received new PDCP packet.
2. The method of claim 1 , wherein the PDCP status information indicates a reception status of the at least one PDCP packet.
3. The method of claim 1 , wherein the PDCP status information is transmitted to a target eNB.
4. The method of claim 1 , wherein the re-established RLC entity is used in a target cell.
5. The method of claim 4 , further comprising: checking at least one PDCP packet with the associated SN lower than the SN associated with the received new PDCP packet, and at least one PDCP packet with the consecutively associated SN starting from the SN associated with the received new PDCP packet.
6. The method of claim 1 , wherein the at least one PDCP packet with the associated SN lower than the SN associated with the received new PDCP packet and the at least one PDCP packet with the consecutively associated SN starting from the SN associated with the received new PDCP packet are correctly received before the re-establishing the RLC entity.
7. The method of claim 1 , wherein the PDCP status information comprises at least one SN associated with at least one missing PDCP packet.
8. The method of claim 1 , wherein the PDCP status information comprises at least one SN associated with at least one correctly received PDCP packet.
9. A user equipment (UE) apparatus for receiving a message associated with a handover in a wireless communication system, the UE apparatus comprising: a radio link control (RLC) entity configured to assemble at least one PDCP packet from at least one RLC packet, deliver the assembled at least one PDCP packet to a packet data convergence protocol (PDCP) entity, and be re-established; and the PDCP entity configured to store the delivered at least one PDCP packet in a PDCP buffer, generate PDCP status information, transmit the PDCP status information, receive from the RLC entity a new PDCP packet having a sequence number (SN), and deliver to a higher layer the at least one PDCP packet with an associated SN lower than the SN associated with the received new PDCP packet and the at least one PDCP packet with a consecutively associated SN starting from the SN associated with the received new PDCP packet.
10. The UE apparatus of claim 9 , wherein the PDCP status information indicates a reception status of the at least one PDCP packet.
11. The UE apparatus of claim 9 , wherein the PDCP entity transmits the PDCP status information to a target eNB.
12. The UE apparatus of claim 9 , wherein the re-established RLC entity is used in a target cell.
13. The UE apparatus of claim 12 , wherein the PDCP entity is further configured to: check at least one PDCP packet with the associated SN lower than the SN associated with the received new PDCP packet, and at least one PDCP packet with the consecutively associated SN starting from the SN associated with the received new PDCP packet.
14. The UE apparatus of claim 9 , wherein the at least one PDCP packet with the associated SN lower than the SN associated with the received new PDCP packet and the at least one PDCP packet with the consecutively associated SN starting from the SN associated with the received new PDCP packet are correctly received before the RLC entity is re-established.
15. The UE apparatus of claim 9 , wherein the PDCP status information comprises at least one SN associated with at least one missing PDCP packet.
16. The UE apparatus of claim 9 , wherein the PDCP status information comprises at least one SN associated with at least one correctly received PDCP packet.
Unknown
April 18, 2017
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